//
// Created by Castle on 2025/10/29.
//

#include<stdio.h>


int main(){
    // 等腰三角形判断
    int side1,side2,side3;
    printf("Please enter the three lengths: ");
    scanf("%d%d%d",&side1,&side2,&side3);
    if(side1 == side2 || side1 == side3 || side2 == side3){
        printf("Isosceles triangle\n");
    }

    return 0;
}